Hey XstormX,
Makita sells only bits with diameter on the cutter of max. 1/2" for this hand trim router. Anything wider will slow down the hand trim router too much, and as you can read in the manual, if it is too slow, it will heat up and malfunction. Nearly all the frequent reports of burning Makita hand trim routers were when using surfacing bits of 1.75" – 2.15" cutter diameter. Note that the Makita is made for short, hand-held use. Makita support confirmed that as soon that you mount it into a cnc machine, the warranty is gone.
This has to do with the motor characteristics of a router. See here for Differences between router and spindle.